For MPU latency constraints to work, CONFIG_CPU_IDLE must be enabled,
since CPUIdle is where the constraints are evaluated.  Warn during
compilation if CONFIG_CPU_IDLE is not defined.

Signed-off-by: Paul Walmsley <[email protected]>
---
 arch/arm/mach-omap2/resource34xx.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/resource34xx.c 
b/arch/arm/mach-omap2/resource34xx.c
index 25535a3..1693e9b 100644
--- a/arch/arm/mach-omap2/resource34xx.c
+++ b/arch/arm/mach-omap2/resource34xx.c
@@ -28,6 +28,10 @@
 #include "cm.h"
 #include "cm-regbits-34xx.h"
 
+#ifndef CONFIG_CPU_IDLE
+#warning MPU latency constraints require CONFIG_CPU_IDLE to function!
+#endif
+
 /**
  * init_latency - Initializes the mpu/core latency resource.
  * @resp: Latency resource to be initalized
-- 
1.6.3.GIT

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